Search results for " Opera"

showing 10 items of 3606 documents

Sine cura. Verso il ri-ciclo dell'architettura del secondo Novecento

2019

Gli argomenti discussi nel saggio interrogano il destino che il Codice dei Beni Culturali (2004- 2011) determina per le opere del secondo Novecento. Nella costruzione del futuro di questi manufatti, che per funzione, tecnologia e cicli d’uso sono spesso segnati dall’obsolescenza e dall’abbandono, le ambiguità e le incongruenze delle attuali procedure legislative sollecitano profondamente il ruolo culturale delle esperienze di ricerca che usano metodologie meta progettuali. Il confronto fra alcuni casi italiani ed altri europei rimarca il ruolo del progetto nella costruzione di una prospettiva di tutela trasformativa per il costruito del secondo Novecento. Nel quadro di azione marcato dall’o…

Settore ICAR/14 - Composizione Architettonica E UrbanaThe essay questions the future's possibilities to operate on the buildings of the second half of the twentieth century according to the Italian Code of Cultural Heritage (2004-2011). When arguing how to encourage the re-use of these artifacts which are often marked by short-life technology cycles obsolescence and abandonment the ambiguities and inconsistencies of current legislative procedures deeply stress the cultural role of research experiences that use project-oriented methodologies. The comparison between some Italian and other European cases highlights the role of a design approach in the construction of a transformative protection perspective for the built matter of the second half of the twentieth century. In a framework aiming to encourage a reconciliation between the recent built environment and the new paradigms of sustainability and circular economy architecture must recognize re-cycle practices as a main theoretical and procedural node. To modernize the late Modern built environment with contemporary construction components is not simply a matter of technical knowledge and expertise: but a theme with theoretical density aesthetic and ethical values. The architectural project in this field today must ask for greater congruence between the bureaucratic and administrative levels and the real consistency of this corpus. It is a matter of identifying strategies to equip it with capabilities meanings and contents remembering that demolition wastes have unsustainable environmental costs and uncertain results concerning the necessary new attribution of political and semantic meaning that these places await.
researchProduct

Opere prime di Vittorio Ugo a Monreale - parte 1°

2012

Vittorio Ugo (Palermo 1938-2005), riconosciuto come uno dei più rappresentativi teorici italiani di architettura, ha esordito come architetto nei primi anni Sessanta, ereditando l'importante studio professionale del padre. Le sue opere, inedite fino ad oggi, sembrerebbero aprire una nuova pagina di grande interesse per l'architettura del secondo Novecento in Sicilia.

Settore ICAR/18 - Storia Dell'ArchitetturaVittorio Ugo villa Blake anni Sessanta Palermo Monreale secondo Novecento opera prima
researchProduct

STUDIO DI UN AMMORTIZZATORE ELETTROMAGNETICO A RECUPERO DI ENERGIA

2013

Questo lavoro ha come obiettivo principale lo studio teorico e con supporto di software F.E.M. di un dispositivo che consenta recupero energetico da una sospensione automobilistica. In sostituzione allo smorzatore viscoso, che dissipa l’energia cinetica del veicolo a seguito dell’attraversamento di strade sconnesse o ostacoli più marcati, si è usato uno smorzatore elettromagnetico che svolga le funzioni dello smorzatore viscoso consentendo un recupero di energia elettrica. Lo smorzatore elettromagnetico è di tipo a magneti permanenti e il suo funzionamento si basa sul fenomeno dell’induzione elettromagnetica. Il modello matematico descrive il funzionamento dello smorzatore, restituendo i va…

Settore ING-IND/14 - Progettazione Meccanica E Costruzione Di MacchineMain objective of this work is the theoretical study and support of FEM software of a device that allows for energy recovery from an automotive suspension. In replacing the viscous damper which dissipates the kinetic energy of the vehicle due to rough roads or obstacles more marked an electromagnetic damper is used that performs the functions of the viscous damper allowing a recovery of electricity. The damper is of the electromagnetic type with permanent magnets and its operation is based on the phenomenon of electromagnetic induction. The mathematical model describes the operation of the damper restoring the values of the electrical and mechanical magnitudes as a function of the relative speed between the rod and the stator. Energy recovery has been estimated considering an electric minicar that transits on a bumpy road. The recovered power has a total value of about 250W.
researchProduct

Poly lactic acid based foams prepared via thermally induced phase separation (TIPS): A method to tune the crystallinity

2012

Blends of Poly-L-Lactic Acid (PLLA) with two Poly-Lactic Acid (PLA) in different proportions (90/10 and 70/30) were utilized in order to produce biodegradable and biocompatible scaffolds for soft tissue engineering applications. The scaffolds were produced via thermally induced phase separation (TIPS) starting from ternary systems where dioxane was the solvent and water the non-solvent. Morphology was evaluated by Scanning Electron Microscopy (average pore size and interconnection). Moreover a DSC analysis was carried out on the as-obtained scaffold in order to obtain information about theirs thermal properties (enthalpy of melt and crystallization). The results showed that is possible to p…

Settore ING-IND/24 - Principi Di Ingegneria ChimicaMorphology (linguistics)Materials scienceScanning electron microscopetechnology industry and agriculturelaw.inventionSolventScaffold phase separation polymer blending poly lactic acidCrystallinitySettore ING-IND/22 - Scienza E Tecnologia Dei MaterialiDifferential scanning calorimetrylawPolymer blendCrystallizationComposite materialTernary operationAIP Conference Proceedings
researchProduct

New considerations for modelling a MED-TVC plant under dynamic conditions

2019

Abstract The multiple-effect distillation (MED) technology is nowadays the most promising desalination process to be coupled with variable heat sources, thus leading to a more sustainable way to produce water. In order to prove the potential of this, it is of major interest to develop powerful modelling tools to predict the performance of this coupling. Only a few models have been presented so far. They show promising results but were based on some simplifying assumptions and non-physical constraints that could limit the analysis of the dynamic behaviour of a MED plant. This paper presents new considerations for the dynamic modelling of a MED plant associated with a thermal vapour compressi…

Settore ING-IND/26 - Teoria Dello Sviluppo Dei Processi ChimiciComputer scienceGeneral Chemical Engineering02 engineering and technologyTransient operation7. Clean energyDesalinationDynamic modelControl strategy[CHIM.GENI]Chemical Sciences/Chemical engineering020401 chemical engineeringLimit (music)Mass flow rateGeneral Materials Science[SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering0204 chemical engineeringProcess engineeringCondenser (heat transfer)ComputingMilieux_MISCELLANEOUSWater Science and Technologybusiness.industryDesalinationMechanical EngineeringProcess (computing)General Chemistry021001 nanoscience & nanotechnology6. Clean waterDynamic simulationVariable (computer science)Transient (oscillation)0210 nano-technologybusiness
researchProduct

Experimental Comparison of Type-1 and Type-2 Fuzzy Logic Controllers for the Control of Level and Temperature in a Vessel

2011

Abstract The objective of this experimental study is to compare the performance of type-1 and type-2 fuzzy logic controllers on a real system where the control of liquid level and temperature are considered. By the use of genetic algorithms it is possible to optimize the fuzzy sets of each fuzzy controller assuring high control performance. The experimental results show that a better control in terms of robustness can be achieved by type-2 fuzzy logic controllers.

Settore ING-IND/26 - Teoria Dello Sviluppo Dei Processi ChimiciFuzzy classificationNeuro-fuzzyComputer scienceControl engineeringFuzzy control systemFuzzy logicDefuzzificationFuzzy electronicsControl theoryFuzzy set operationsFuzzy numberType-1 fuzzy logic controller type-2 fuzzy logic controller genetic algorithms.
researchProduct

INVERTER-BASED DISTRIBUTED GENERATORS, MODELING AND CONTROL

In the last few years, electrical power generation is moving from a centralized generation towards distributed generation including on-site Renewable Energy Sources (RESs). In order to overcome RES related issues, as intermittent and fluctuating power, storage elements are included in the on-site generation system. The interaction between distributed generator (DG) units including RES, storage and front-end power converters should be carefully modeled in order to analyze the power system stability. An accurate modeling of DGs is required. In this thesis, a new modeling approach has been proposed for the inverter-based DGs based on the concept of electrostatic synchronous machines. Detailed …

Settore ING-IND/33 - Sistemi Elettrici Per L'EnergiaKeywords: Distributed Generators Voltage Source Inverters Electrostatic Synchronous Machines Microgrids Islanded microgrids nonlinear droop control minimum losses operation Optimal Power Flow.Distributed Generators Voltage Source Inverters Electrostatic Synchronous Machines Microgrids Islanded microgrids nonlinear droop control minimum losses operation Optimal Power Flow. [Keywords]
researchProduct

How firms are using networking decisions to achieve strategic objectives: Building theories from four case studies

2011

Many research studies in OM literature have investigated how different kinds of focal firm decisions regarding business vertical relationships (i.e. with both suppliers and buyers) can positively affect firm’s operations performance and thus improve its competitive position. In this paper we extend this genre of study by also considering business horizontal relationships (i.e with competitors and firms that own complementary capabilities) and by considering the impact of business relationships not only on focal firm’s operations performance but also on its resources endowment. We present four cases that describe what are the strategic manager intents (in term of operations performance and r…

Settore ING-IND/35 - Ingegneria Economico-GestionaleNetworking strategis Operations Management Case Studies
researchProduct

The reconciliation process of market requirements and operations resources – an empirical view

2018

Firms are confronted with the challenge of designing strategy processes, which guide decision-making in a way that leads to high and sustainable performance. The purpose of this paper is to address this challenge, by delivering empirical insights on Slack & Lewis’ concept of reconciliation in Operations Strategy from a process point-of-view. We argue that while this concept roots in the alignment literature of Operations Strategy it has not yet been subject to detailed and empirical research. We discuss the development of a survey that examines if and how reconciliation is carried out in companies and how this affects operations performance.

Settore ING-IND/35 - Ingegneria Economico-GestionaleOperations Strategy Empirical Research in Operations Management
researchProduct

Dealing with uncertainty in consensus protocol

2009

Recent results on Consensus protocols for networks are presented. The basic tools and the main contribution available in the literature are considered, together with some of the related challenging aspects: estimation in networks and how to deal with disturbances is considered. Motivated by applications to sensor, peer-to-peer, and ad hoc networks, many papers have considered the problem of estimation in a consensus fashion. Here, the Unknown But Bounded (UBB) noise affecting the network is addressed in details. Because of the presence of UBB disturbances convergence to equilibria with all equal components is, in general, not possible. The solution of the $\epsilon$-consensus problem, where…

Settore ING-INF/04 - AutomaticaConsensus protocol optimizazion disturbancesSettore MAT/09 - Ricerca Operativa
researchProduct